Yazar "Ahmad, Naushad" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • [ X ]
    Öğe
    Application of a Chitosan-Cinnamon Essential Oil Composite Coating in Inhibiting Postharvest Apple Diseases
    (Mdpi, 2023) Zhang, Wanli; Goksen, Gulden; Zhou, Yuanping; Yang, Jun; Khan, Mohammad Rizwan; Ahmad, Naushad; Fei, Tao
    The purpose of this study was to explore the film-forming properties of cinnamon essential oil (CEO) and chitosan (CS) and the effect of their composite coating on postharvest apple diseases. The results demonstrated that the composite coating exhibits favorable film-forming properties at CEO concentrations below 4% (v/v). The effectiveness of the composite coating in disease control can be attributed to two factors: the direct inhibitory activity of CEO against pathogens in vitro and the induced resistance triggered by CS on the fruits. Importantly, the incorporation of CEO did not interfere with the induction of resistance by CS in harvested apples. However, it is noteworthy that the inhibitory effect of the CS-CEO composite coating on apple diseases diminished over time. Therefore, a key aspect of enhancing the preservation ability of fruits is improving the controlled release properties of CEO within CS coatings. This will enable a sustained and prolonged antimicrobial effect, thereby bolstering the fruit preservation capabilities of the composite coatings.
  • [ X ]
    Öğe
    Development and characterization of zein co-encapsulated wampee essential oil and propolis extract films for food preservation
    (Elsevier Sci Ltd, 2025) He, Jinman; Goksen, Gulden; Cong, Xinli; Khan, Mohammad Rizwan; Ahmad, Naushad; Zhang, Wanli
    This study aims to develop zein co-encapsulated Wampee [Clausena lansium (Lour.) Skeels] essential oil (WEO) and propolis ethanol extract (PEE) for incorporation into sodium alginate matrix (ZPWS). The films were evaluated for their morphological features, chemical structure, mechanical and barrier properties, as well as their resistance to high temperatures. Additionally, antibacterial effects and antioxidant activities of films were investigated. The functional properties of zein were also evaluated for its ability to effectively co-encapsulate WEO and PEE, achieving in delayed release. Overall, the ZPWS films exhibited excellent functional properties compared the original films. These enhancements included greater tensile strength, increased rigidity, heightened resistance to water, improved thermal stability, a more condensed structure, and the presence of strong antioxidant and long-lasting bacteriostatic properties. Finally, a real-time study on the edible coated films was carried out strawberries preservation. The ZPWS film demonstrated good potential for application in food preservation.
  • [ X ]
    Öğe
    Functionalized sodium alginate composite films based on double-encapsulated essential oil of wampee nanoparticles: a green preservation material
    (Elsevier, 2024) He, Jinman; Zhang, Wanli; Goksen, Gulden; Khan, Mohammad Rizwan; Ahmad, Naushad; Cong, Xinli
    In this study, zein-pectin nanoparticles loaded with Wampee [ Clausena lansium (Lour.) Skeels] (WEO) were developed. The particle size of the nanoparticles is 515.9 nm, polydispersity index is 0.4 and zeta potential is-39.3 mV. Subsequently, the ZWP was incorporated into sodium alginate (SA)-based film (ZWP-S). The films were then analyzed to determine their physical properties and thermal stability, and also to examine their microstructure and intermolecular forces using SEM, FTIR, and XRD techniques. Additionally, the films were evaluated for their antimicrobial and antioxidant activity, as well as their ability to sustain the release of WEO. Overall, the ZWP-S film conferred excellent functional properties, including UV barrier performance, mechanical properties (21 % increase in tensile strength), water sensitivity, stability, more compact structure, high antioxidant activity and long-lasting antimicrobial activity, surpassing those of the control film. Consequently, it was applied as a novel coating for preserving strawberries, rotting rate of strawberries was reduced by 43 % at 6d, yielding promising results in prolonging the freshness of the fruit.
  • [ X ]
    Öğe
    Green-synthesized silver nanoparticles immobilized on graphene oxide for fruit preservation in alginate films
    (Elsevier, 2024) Yang, Jun; Goksen, Gulden; Khan, Mohammad Rizwan; Ahmad, Naushad; Zhang, Wanli
    In this study, silver nanoparticles were synthesized by redox method using tea polyphenol as a reducing agent. These nanoparticles were then immobilized within sodium alginate (SA) composite films using graphene oxide (Go), resulting in films with enhanced food preservation capabilities. Initially, the synthesized silver nanoparticles underwent characterization through X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). This characterization affirmed the successful synthesis of silver nanoparticles. Subsequently, the impact of silver nanoparticles and graphene oxide on the properties of the SA composite films was investigated. The SA composite films were analyzed barrier, mechanical, thermal stability, and functional properties. The findings revealed that the inclusion of silver nanoparticles immobilized in Go augmented the tensile strength (23.6 %), degradation temperature of the films, reduced water vapor permeability, and exhibited antioxidant properties (4.16 %-42.09 %), and antimicrobial activities against Escherichia coli and Staphylococcus aureus (19.79-20.37 times). The graphene oxide immobilizes the silver nanoparticles, thereby reducing the release concentration. Packaging blueberry fruits with the SA composite film impregnated with Go-immobilized silver nanoparticles reduced weight loss and wrinkle index and this enhanced blueberry fruit shelf life. Thus, this work presents a novel approach to preparing antimicrobial packaging films for post-harvest fruit preservation.